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Patent Searching and Data


Title:
MOTOR UNIT AND ELECTRIC BICYCLE
Document Type and Number:
WIPO Patent Application WO/2019/177000
Kind Code:
A1
Abstract:
Provided are a motor unit and an electric bicycle to which bearings can be mounted, even if an input shaft has a larger diameter part in the axial direction. A motor unit (3) according to a first aspect comprises: a case; a motor (5); an input shaft (6); an input member (7); an output member (8); and a reduction mechanism (31). The input shaft (6) is rotatably positioned so as to pass through the case (4) in the axial direction. The input member (7) is positioned along the outer peripheral surface of the input shaft (6), and rotates together with the input shaft (6). The output member (8) is rotatably positioned along the outer peripheral surface of the input shaft (6), and receives rotational force from the input member (7). The input shaft (6) comprises: a first portion (62) having a first axial diameter and positioned along part of the axial direction; and a second portion (63) having a second axial diameter smaller than the first axial diameter. The input shaft (6) has a bearing (64) which is mounted along the outer peripheral surface of the second portion (63) and which comprises a needle roller bearing or a cylinder containing a bush or needle bearings, and is formed so as to be separated in the circumferential direction or so as to be able to stretch such that the inner diameter thereof expands.

Inventors:
KAWAKAMI, Masafumi
OKUDA, Kento
Application Number:
JP2019/010201
Publication Date:
September 19, 2019
Filing Date:
March 13, 2019
Export Citation:
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Assignee:
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. (1-61, Shiromi 2-chome Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
International Classes:
B62M6/55; F16C23/00
Foreign References:
JP2017218104A2017-12-14
JP2013208920A2013-10-10
JP2017145937A2017-08-24
US1921488A1933-08-08
JP2007247875A2007-09-27
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (Umeda Square Bldg, 12-17 Umeda 1-chome, Kita-ku, Osaka-sh, Osaka 01, 〒5300001, JP)
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